My Mahogany Obsidian blanks are cut from nice clean obsidian. Mahogany has long been a favorite with flintknappers. They are available in lengths from 2 inches in length to 8 inches. They are 3/8" in thickness, just right for pressure flaking. Longer lengths are 2 inches wide and shorter lengths are 1 3/4" wide. Mahogany blanks are $1 per running inch and always in stock for immediate shipment.